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<meta name="description" content="Support selecting ports within nodes."/> 
<link rel="stylesheet" href="../assets/css/style.css"/> 
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<title>Selectable Ports</title>
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<body>
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          <h1 class="mb-0 p-1 ">GoJS</h1>
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    <!-- * * * * * * * * * * * * * -->
    <!-- Start of GoJS sample code -->
    
    <script src="../release/go.js"></script>
    <div class="p-4 w-full">
    <script id="code">
    function init() {
      var $ = go.GraphObject.make;

      myDiagram =
        $(go.Diagram, "myDiagramDiv",
          {
            // For this sample, automatically show the state of the diagram's model on the page
            "ModelChanged": function(e) {
              if (e.isTransactionFinished) showModel();
            },
            "undoManager.isEnabled": true
          });

      var UnselectedBrush = "lightgray";  // item appearance, if not "selected"
      var SelectedBrush = "dodgerblue";   // item appearance, if "selected"

      function makeItemTemplate(leftside) {
        return $(go.Panel, "Auto",
          { margin: new go.Margin(1, 0) },  // some space between ports
          $(go.Shape,
            {
              name: "SHAPE",
              fill: UnselectedBrush, stroke: "gray",
              geometryString: "F1 m 0,0 l 5,0 1,4 -1,4 -5,0 1,-4 -1,-4 z",
              spot1: new go.Spot(0, 0, 5, 1),  // keep the text inside the shape
              spot2: new go.Spot(1, 1, -5, 0),
              // some port-related properties
              toSpot: go.Spot.Left,
              toLinkable: leftside,
              fromSpot: go.Spot.Right,
              fromLinkable: !leftside,
              cursor: "pointer"
            },
            new go.Binding("portId", "name")),
          $(go.TextBlock,
            new go.Binding("text", "name"),
            { // allow the user to select items -- the background color indicates whether "selected"
              isActionable: true,
              //?? maybe this should be more sophisticated than simple toggling of selection
              click: function(e, tb) {
                var shape = tb.panel.findObject("SHAPE");
                if (shape !== null) {
                  // don't record item selection changes
                  var oldskips = shape.diagram.skipsUndoManager;
                  shape.diagram.skipsUndoManager = true;
                  // toggle the Shape.fill
                  if (shape.fill === UnselectedBrush) {
                    shape.fill = SelectedBrush;
                  } else {
                    shape.fill = UnselectedBrush;
                  }
                  shape.diagram.skipsUndoManager = oldskips;
                }
              }
            })
        );
      }

      myDiagram.nodeTemplate =
        $(go.Node, "Spot",
          { selectionAdorned: false },
          { locationSpot: go.Spot.Center, locationObjectName: "BODY" },
          new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
          $(go.Panel, "Auto",
            { name: "BODY" },
            $(go.Shape, "RoundedRectangle",
              { stroke: "gray", strokeWidth: 2, fill: "transparent" },
              new go.Binding("stroke", "isSelected", function(b) { return b ? SelectedBrush : UnselectedBrush; }).ofObject()),
            $(go.Panel, "Vertical",
              { margin: 6 },
              $(go.TextBlock,
                new go.Binding("text", "name"),
                { alignment: go.Spot.Left }),
              $(go.Picture, "images/60x90.png",
                { width: 30, height: 45, margin: new go.Margin(10, 10) })
            )
          ),
          $(go.Panel, "Vertical",
            { name: "LEFTPORTS", alignment: new go.Spot(0, 0.5, 0, 7) },
            new go.Binding("itemArray", "inservices"),
            { itemTemplate: makeItemTemplate(true) }
          ),
          $(go.Panel, "Vertical",
            { name: "RIGHTPORTS", alignment: new go.Spot(1, 0.5, 0, 7) },
            new go.Binding("itemArray", "outservices"),
            { itemTemplate: makeItemTemplate(false) }
          )
        );

      myDiagram.linkTemplate =
        $(go.Link,
          { routing: go.Link.Orthogonal, corner: 10, toShortLength: -3 },
          { relinkableFrom: true, relinkableTo: true, reshapable: true, resegmentable: true },
          $(go.Shape, { stroke: "gray", strokeWidth: 2.5 })
        );

      function findAllSelectedItems() {
        var items = [];
        for (var nit = myDiagram.nodes; nit.next();) {
          var node = nit.value;
          //?? Maybe this should only return selected items that are within selected Nodes
          //if (!node.isSelected) continue;
          var table = node.findObject("LEFTPORTS");
          if (table !== null) {
            for (var iit = table.elements; iit.next();) {
              var itempanel = iit.value;
              var shape = itempanel.findObject("SHAPE");
              if (shape !== null && shape.fill === SelectedBrush) items.push(itempanel);
            }
          }
          table = node.findObject("RIGHTPORTS");
          if (table !== null) {
            for (var iit = table.elements; iit.next();) {
              var itempanel = iit.value;
              var shape = itempanel.findObject("SHAPE");
              if (shape !== null && shape.fill === SelectedBrush) items.push(itempanel);
            }
          }
        }
        return items;
      }

      // Override the standard CommandHandler deleteSelection and canDeleteSelection behavior.
      // If there are any selected items, delete them instead of deleting any selected nodes or links.

      myDiagram.commandHandler.canDeleteSelection = function() {
        // true if there are any selected deletable nodes or links,
        // or if there are any selected items within nodes
        return go.CommandHandler.prototype.canDeleteSelection.call(myDiagram.commandHandler) ||
          findAllSelectedItems().length > 0;
      };

      myDiagram.commandHandler.deleteSelection = function() {
        var items = findAllSelectedItems();
        if (items.length > 0) {  // if there are any selected items, delete them
          myDiagram.startTransaction("delete items");
          for (var i = 0; i < items.length; i++) {
            var item = items[i];
            var nodedata = item.part.data;
            var itemdata = item.data;
            // find the item array that the item data is in; try "inservices" first
            var itemarray = nodedata.inservices;
            var itemindex = itemarray.indexOf(itemdata);
            if (itemindex < 0) {  // otherwise try "outservices"
              itemarray = nodedata.outservices;
              itemindex = itemarray.indexOf(itemdata);
            }
            if (itemindex >= 0) {
              myDiagram.model.removeArrayItem(itemarray, itemindex);
            }
          }
          myDiagram.commitTransaction("delete items");
        } else {  // otherwise just delete nodes and/or links, as usual
          go.CommandHandler.prototype.deleteSelection.call(myDiagram.commandHandler);
        }
      };

      myDiagram.model =
        $(go.GraphLinksModel,
          {
            copiesArrays: true,
            copiesArrayObjects: true,
            linkFromPortIdProperty: "fromPort",
            linkToPortIdProperty: "toPort",
            nodeDataArray: [
              { key: 1, name: "Server", inservices: [{ name: "s1" }, { name: "s2" }], outservices: [{ name: "o1" }], loc: "0 0" },
              { key: 2, name: "Other", inservices: [{ name: "s1" }, { name: "s2" }], loc: "200 60" }
            ],
            linkDataArray: [
              { from: 1, fromPort: "o1", to: 2, toPort: "s2" }
            ]
          });

      showModel();

      function showModel() {
        document.getElementById("mySavedModel").value = myDiagram.model.toJson();
      }
    }
    window.addEventListener('DOMContentLoaded', init);
  </script>

<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
  <p>
    Click on a port to toggle its selection.
    The Delete command will only delete selected ports, if there are any; otherwise it will delete Nodes and Links as it normally would.
  </p>
  <p>The model data, automatically updated after each change or undo or redo:</p>
  <textarea id="mySavedModel" style="width:100%;height:300px"></textarea>
</div>
    </div>
    <!-- * * * * * * * * * * * * * -->
    <!--  End of GoJS sample code  -->
  </div>
</body>
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<script src="../assets/js/goSamples.js"></script>
</html>
